Fastener



FIG. 1 is a perspective view of the fastener of the present invention;

FIG. 2 is a top view of the fastener of FIG. 1, the bottom view being a mirror image thereof; and,

FIG. 3 is a left side view of the fastener of FIG. 1, the right side view being a mirror image thereof. 

CLAIM The ornamental design for a fastener, as shown and described. 